The idea the writer wishes to convey about the subject—the writer's view of the world or a revelation about human nature. To identify the theme, be sure that you've first identified the story's plot, the way the story uses characterization, and the primary conflict in the story :)
Answer:
Shelley described Frankenstein's monster as an 8-foot-tall, hideously ugly creation, with translucent yellowish skin pulled so taut over the body that it “barely disguised the workings of the arteries and muscles underneath,” watery, glowing eyes, flowing black hair, black lips, and prominent white teeth.
I suppose that this depends on your standpoint on this topic.
Pro Gender Identity Spectrum:
"While many people only know of two binary genders, others believe that gender is on a spectrum, rather than two set identities."